package cn.tedu.v3;

import java.io.*;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Scanner;

/**
 * 多人聊天室 Version 3
 * Sever服务器：找到CS多线程类
 *   1.读入放入线程中
 *   2.写出直接写在run方法中
 */
public class Server {
    private ServerSocket serverSocket;

    public Server(){
        try {
            serverSocket=new ServerSocket(1268);
        } catch (BindException e) {
            System.out.println("请检查端口号，被占用");
        }
        catch (IOException e) {
            System.out.println("客户端没有链接上");
        }
    }


    public  void start()  {
        Socket socket = null;
        String ip=null;
        try {
         while (true) {
          System.out.println("等待客户端连接");
            socket = serverSocket.accept();


            new Thread( new CS(socket)).start();

             }
          }
          catch (IOException e) {
           System.out.println(ip+"客户端链接断开链接");
           } finally {

            if (serverSocket!=null&&serverSocket.isClosed()){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    System.out.println("服务器关闭失败");
                }
                System.out.println("服务器关闭成功");
            }
         }
    }


    public static void main(String[] args)  {
        Server server=new Server();
        server.start();
    }


    private class CS implements Runnable{

        private  Socket  socket;


        private String ip;
        public CS(Socket s){
            this.socket=s;

            ip=socket.getInetAddress().getHostAddress();

        }


        public void run() {

        //BufferedReader br=null;
        PrintWriter pw=null;

        try {
        //1.2 读入操作
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));

        //1.1写出操作
        pw=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(),"UTF8")),true);
         //1.3创建线程---Lambda--读入功能--存入线程
            new Thread(()->{
                //1.4线程中--创建变量--接收客户端发来文本
                try {
                    String message;
                    while ((message= br.readLine())!=null) {//读入客户端
                    System.out.println(ip+"客户端：" + message);
                    //1.6增加一句--每次客户端发给服务器端内容
                    System.out.print("服务器请输入：");
                }
                } catch (IOException e) {
                    System.out.println("客户端发来的消息断开了");
                }
            }).start();
            //1.5增加写出操作【修改目的：读入写出通顺】
            //1.5.1控制台卡住--输入内容
            Scanner input=new Scanner(System.in);
            //1.5.2一直写出
            while (true){
                System.out.println("服务器请输入：");
                String sme=input.nextLine();
                pw.println("服务器端说："+sme);
            }



          } catch (UnsupportedEncodingException e) {
            System.out.println("请检查客户端/服务器端编码集：不一致");
          }catch (SocketException e){
              System.out.println("客户端链接被重置");
          }
            catch (IOException e) {
            System.out.println("客户端链接失效");
          } finally {

           /* if (br!=null)
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("读入流断开连接");
                }*/

              if (socket!=null&&!socket.isClosed()){
                  System.out.println(ip+"客户端退出服务器链接");
                  try {
                      socket.close();
                  } catch (IOException e) {
                      System.out.println(ip+"客户端退出服务器链接");
                  }
           }

        }
      }
   }
}
